The message was undeliverable because the recipient specified has changed address permanently and forwarding was not applicable
The message transfer agent (MTA) configuration parameter '{4}' on server {2} is set too low and may cause mail flow issues. ...
The message transfer agent (MTA) diagnostic logging level on server {2} is greater than 5. As such, the service is in debugging ...
The message transfer agent (MTA) diagnostic logging level on server {2} is set to a non-zero value. This level is used for ...
The message was not delivered because of Administrator action through the queue viewer interface in Exchange System Manager. ...
The message was undeliverable because the recipient specified has changed address permanently and forwarding was not applicable ...
The message was undeliverable because the recipient specified has changed address temporarily (departed) and forwarding was ...
The message was undeliverable because the recipient specified has changed address temporarily (on travel) and forwarding ...
The message was undeliverable because the recipient specified in the recipient postal address did not collect the message ...
The message was undelivered because the physical delivery office identified by the specified recipient postal address was ...